| Acronym | Meaning |
| PESOS | Perkin-Elmer Solvent Optimization System |
| PWHT | Post-weld Heat Treatment |
| NREL | National Renewable Energy Laboratory (formerly SERI) |
| IGFBP | Insulin-like Growth Factor-binding Proteins |
| LEP | Local Electron Pair (model For Intra- & Intermol. Interactions) |
| DDT | Dichlorodiphenyltrichloroethane |
| TMFA | Three-mode Factor Analysis |
| PEM | Pacific Exploratory Measurements |
| GAEP | Generalized Atomic Effective Potential |
| HSV | Herpes Simplex Virus |